Image processing apparatus and image processing method

1. An image processing apparatus, comprising: an image reading device that: reads images from a plurality of pages of document sheets, and generates a plurality of image files by assigning an image of one page to each of the image files; a storage device that stores the image files, a file name being assigned to the image files for each page, the file name having a file identifier including an assigned character string; and a controller configured to: generate groups to which each of the plurality of image files belong, assign a variable character string to the file identifier for each image file of the plurality of image files belonging to a group and repeatedly assign the same character string to the file identifier in each group, and determine the file name of each of the image files by using the file identifier.

2. The image processing apparatus according to claim 1 , wherein the controller includes: a file counter that assigns the variable character string to the file identifier, and a processor that determines the file name.

3. The image processing apparatus according to claim 2 , wherein the file name further includes a document identifier including a character string commonly assigned to all the image files generated from a set of the plurality of pages of document sheets continuously read by the image reading device at once.

4. The image processing apparatus according to claim 3 , wherein the processor determines the file name by using the document identifier including an invariable character string for the set of the plurality of pages of document sheets.

5. The image processing apparatus according to claim 2 , wherein the file name further includes a group identifier including a character string assigned to each of the image files which are generated from a set of the plurality of pages of document sheets and belong to the same group.

6. The image processing apparatus according to claim 5 , wherein the controller further includes a group counter that: acquires a number of pages of the set of the plurality of pages of document sheets designated by a user, and assigns a variable character string to the group identifier for each of the acquired number of pages.

7. The image processing apparatus according to claim 6 , wherein the processor determines the file name by using the group identifier determined by the group counter.

8. The image processing apparatus according to claim 7 , wherein the storage device stores folders, each folder including the image files to which file names including the same group identifier are assigned.

9. The image processing apparatus according to claim 8 , wherein the processor sorts the image files into the folders according to group identifier.

10. An image processing method executed by an image processing apparatus, the method comprising: reading images from a plurality of pages of document sheets and generating a plurality of image files by assigning an image of one page to each of the image files; generating groups to which each of the plurality of image files belong; assigning a variable character string to a file identifier for each image file of the plurality of the image files and repeatedly assigning the same character string to the file identifier in each group; determining file names of the image files by using the file identifier; and storing the image files to which the determined file names are assigned.